Luminescent compound for controlling traveling and method for controlling traveling using the same

Abstract

According to the present invention, when the traveling of an automatic guided vehicle is optically controlled, a traveling controlling means containing a luminescent compound satisfying the following formula (1) is placed in a predetermined range for traveling of the automatic guided vehicle:wherein, A represents the minimum wavelength end (nm) of the luminescent compound, and B represents the maximum wavelength end (nm) of an irradiation light used for the traveling controlling.

What is claimed is:  
     
       1. An optically controlled traveling system, a source of light and a traveling vehicle wherein the system comprises a film on a surface and the traveling vehicle is provided with a detector which controls the direction of travel of the traveling vehicle by detecting emitted light from the film which originates from the source of light wherein the film comprises a luminescent compound which has a minimum luminescent wavelength end (A nm) and an irradiation light source which emits a light having a maximum irradiation wavelength end (B nm), wherein the minimum luminescent wavelength end A is defined as a wavelength which has a strength which is one-twentieth of the maximum luminescence energy strength, the maximum irradiation wavelength end B is defined as a wavelength which has a strength which is one-fifth of the maximum irradiation light energy strength and the difference between A and B satisfies the following formula (1): 
       
         
           A−B≧150 nm  (1)  
         
       
       wherein the luminescent compound is used in a resin composition with a resin and the resin composition in the form of a film is used as a molded resin material which is obtained by molding thereof. 
     
     
       2. The optically controlled traveling system according to claim  1 , wherein the molded resin material has a thickness from 10 to 500 μm. 
     
     
       3. The optically controlled traveling system according to claim  1 , wherein the luminescent compound is present as a layered article comprising the molded resin material and an adhesive layer. 
     
     
       4. An optically controlled traveling system, a source of light and a traveling vehicle wherein the system comprises a film on a surface and the traveling vehicle is provided with a detector which controls the direction of travel of the traveling vehicle by detecting emitted light from the film which originates from the source of light wherein the film comprises a luminescent compound which has a minimum luminescent wavelength end (A nm) and an irradiation light source which emits a light having a maximum irradiation wavelength end (B nm), wherein the minimum luminescent wavelength end A is defined as a wavelength which has a strength which is one-twentieth of the maximum luminescence energy strength, the maximum irradiation wavelength end B is defined as a wavelength which has a strength which is one-fifth of the maximum irradiation light energy strength and the difference between A and B satisfies the following formula (1): 
       
         
           A−B≧150 nm  (1)  
         
       
       wherein the luminescent compound of said film is present as a laminated article which is obtained by applying on a resin film an adhesive containing the luminescent compound. 
     
     
       5. The optically controlled traveling system according to claim  4 , wherein the resin film is selected from polyethylene, polypropylene, polyvinyl chloride, polyvinylidene chloride, polystyrene, polyethylene terephthalate, polycarbonate, polymethyl acrylate, polymethyl methacrylate, polyether ether ketone and polyether sulfone. 
     
     
       6. The optically controlled traveling system according to claim  4 , wherein the luminescent compound of said film is represented by the general formula (2):                    
       wherein, R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7  and R 8  each independently represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group, and A +  represents a quaternary ammonium ion or phosphonium ion. 
     
     
       7. The optically controlled traveling system according to claim  4 , wherein the thickness of the resin film is from 5 to 500 μm. 
     
     
       8. The optically controlled traveling system according to claim  4 , wherein the luminescent compound of said film is contained in an amount from 0.01% by weight to 10% by weight based on the adhesive. 
     
     
       9. The optically controlled traveling system according to claim  4 , wherein the adhesive is an acrylic adhesive. 
     
     
       10. An optically controlled traveling system, a source of light and a traveling vehicle wherein the system comprises a film on a surface and the traveling vehicle is provided with a detector which controls the direction of travel of the traveling vehicle by detecting emitted light from the film which originates from the source of light wherein the film comprises a luminescent compound which has a minimum luminescent wavelength end (A nm) and an irradiation light source which emits a light having a maximum irradiation wavelength end (B nm), wherein the minimum luminescent wavelength end A is defined as a wavelength which has a strength which is one-twentieth of the maximum luminescence energy strength, the maximum irradiation wavelength end B is defined as a wavelength which has a strength which is one-fifth of the maximum irradiation light energy strength and the difference between A and B satisfies the following formula (1): 
       
         
           A−B≧150 nm  (1)  
         
       
       wherein the luminescent compound of said film is present as an ink composition which comprises the luminescent compound, a solvent and a binder and wherein the binder is polymethyl methacrylate, polymethyl acrylate, or a copolymer resin of methyl methacrylate and methyl acrylate. 
     
     
       11. A method for optically controlling a traveling article, wherein a traveling controlling ink composition containing a luminescent compound dissolved in a solvent or binder is placed in a range in which traveling is permitted and the traveling article equipped with a photo-detecting apparatus and an irradiation light source is provided, said method comprising providing light from the irradiation light source and controlling the travel of the traveling article by detecting emitted light from the traveling controlling composition due to excitation of the luminescent compound, 
       with the proviso that the luminescent compound has a minimum luminescent wavelength end (A) and the irradiation light source can emit a light having a maximum irradiation wavelength end (B), wherein the minimum luminescent wavelength end A is defined as a wavelength which has a strength which is one-twentieth of the maximum luminescence energy strength, the maximum irradiation wavelength end B is defined as a wavelength which has a strength which is one-fifth of the maximum irradiation light energy strength and the difference between A and B satisfies the following formula (1):  
       
         
           A−B≧150 nm  (1).  
         
       
     
     
       12. The method for controlling traveling according to claim  11 , wherein the luminescent compound is represented by the general formula (2):                    
       wherein, R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7  and R 8  each independently represents a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a substituted or unsubstituted heteroaryl group, and A +  represents a quaternary ammonium ion or phosphonium ion.